Multiple lift type disk harrow



July 28, 1953 J. P. ROBERTSON 2,646,657

v MULTIPLE LIFT TYPE DISK HARROW Filed June 29, 1948 s Sheets-Sheet 1 49 Q 6 J06; 47 13:51 18 3/ o v INVENTOR.

(304K003; dam 53.0 Mam Zia-Q17 J' July 8, 1953 J. P. ROBERTSON 2,646,657

MULTIPLE LIFT TYPE DISK HARROW Filed June 29, 1948 5 Sheets-Sheet 2 IN V EN TOR.

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July 28, 1953 J. P. ROBERTSON MULTIPLE LIFT TYPE DISK HARROW Filed June 29, 1948 5 Sheets-Sheet 3 I|.. HHUIIII.|I.III I Illll INVENTOR. acfi/w/w 3e BY may Sofie/059c J. P. ROBERTSON MULTIPLE LIFT TYPE DISK HARROW July 28, 1953 5 Sheets-Sheet 4 Filed June 29, 1948 INVENTOR. aofle/ziww, BY

: ATTOk/VEY J. P. ROBERTSON MULTIPLE LIFT TYPE DISK HARROW July 28, 1953 5 Sheets-Sheet 5 Filed June 29, 1948 4 ul/lrllll D o INVENTOR.

jac oow Chi my ao a dbow Patented July 28, 1953 UN I'TED :S TATES 4Claims. 1 My invention relates broadly to agriculture implements and more particularly to alift type multi-disc harrow.

One of the objects of my inventionis to provide a construction of harrow which .mayserve a multiplicity of functions in .properly preparing the ground for planting according to a wide .variety 'ofearth of differing characteristic.

Another objects of my invention is to provide an improved construction of rharrow having a multiplicity of gangs of discs mounted in .units which may be rendered effective in individual or multiple sections in pulverizing .the ground.

Anotherobject-of my invention is to provide a :construction of harrow comprising a multiplicity'of hinged frames each carrying gangs-of-discs wherein the frames maybe folded from-a .copla- -nar position to a position one over the other for :selectively rendering certainroflthe gangsof discs efiective while certain of the othergangs of discs are ineffective in harrowing operations.

:as an individual unit or collectivelyasacoacting unit-in the pulverizing of the earth.

Still another object of myinvention is ,to .provide construction of disc-type .harrow including at least a pair of coactingframemembers coupled with each other-and-adaptedto be. connected with a tractor in which ne of-theframe memhers is constructed in sections andhingedl-y connected with a co-acting frame .member, .said

-frame member and the sections carrying gangs of discs adapted to berendered-selectivelyeffecitive'in operating upon the earth.

Stillanother object of my-in-vention ist provide an arrangementof multiple liftitype-disc 'harrow having co-acting frame membersladapted to be connected with :eachotheranddrawn :by a tractor. and each supportin gangs of .discs withmeans for adjusting the depth ofspenetration of the gangs of discszintothe earth-in-performing a harrowing operation.

Other and further objects of ;my invention reside in the improved'construction of :multiple :liftxtype discharrow iasr setforth-more fully in the specifications.hereinaitersfollowing-by reference to; the accompanying drawings; inwhich:

Figure 1 shows the multiple l ift {type disc harrow of my invention drawn "by a tractor; Fig. 2 is an enlargedside elevational view showing the multiple frame construction of the harrowcarry- 111 gangs of discs where the frames are moved :to coplanar position for effectively utilizing all of'th e gangs of discs; Fig.1? is an elevational view illustrating the rear frame section moved to a position .in which the center of gravity of the mass of 'therear gangs of discs is disposed over .the [front frame structure for concentrating the weight of all of the gangs of discs in the f-ront frame structure for performing a deep harrowins ope a ion Figi a i e at a v showing the front frame section of the 'harrow tilizegl without 'the coupled rear frame section for performing a lighter harrowing operation; 1 Fiig.j5is aside elevational view'showing the rear ,frame section utilized alone in connection with ,the tractor .and with the front frame section wholly lemoved; --Fig. 6 is an enlarged longitu- Qdinal, section .view ithrough the harrow where the two frame sections are operatin in coplanar .relationiorne a i M1 o he gan s o s s; ;Eig.' 7 is a view similar to 'theview shown 'in Fig. ".6 foril u ira ing m r ticularly the a jus Ament means for controlling' the'depth of penetration of the gangs of discs into the earth during a ha rowin o eration; "Fi fifi is afragin n a y lsiderel vat ona view o the a u e t bar employed '1':O1 controlling the depth of penetration of thegan s of discs certain ofthe parts/being lbrolsenawa and ill stra e t s n ;tion; Eig. 91is a;transvers e sectional view'through ;the adjustment ibar' ta ken on line99 of Fig. 8; Fig. '10 is a perspective view of th e front frame member and showin lmqr p r u arl th .nection m anst .th 1 'a tr;1 ig.;1-1,is a t plan .V-i.W- .O theiron nlili fl m emb .sh wingth arr n em n o thean o di v arrie tthe h canfl ;b k.en awa and Shown in se t on attthec u l ug. meanstoth t aq Qni'F 4:2 a ransverse secti nal ,vi w ake -on .li ,i2 -.l 2 .cf Fi .11 andshowingth fr nt fra member in section and. il1ll$ aims th co pli means tot hetractor i e l vatiomli .l ;i .a.s tra ed viewo ione lthaharrowe sps. employe in atlie an stof disc-sinthefrontiramemembe xF d4 enlar edtsectional View th ou h. on of =-the a s ntdisrs a i d by ther arfliame. mem- .b.e the .vie bein take substantiall -p.1 li L L-fi l of;ig.,,l1; 1i1ig. l5 is a bottom plan ,view

f the unt-and r a ftam rm mbers and showing the co acting l nelatLQILQf .the ,gvallgslofdiscs arried thereby; Fiehlfitis altransverse,sectional the conventional tractor having a hydraulic lift mechanism 2 thereon connected through links 3, 4 and 5 with the harrow. Links 3 and 4, as illustrated more particularly in Fig. 11, form coupling means adjacent the base of the hydraulic lift of the harrow while link 5 extends from the top of the hydraulic lift and connects to the coupling means between the harrow and the tractor. The coupling means for the barrow comprises a substantially vertically extending frame formed by a pair of strips shown more clearly in Fig. 10 at 6 and I, pivotally mounted at 2 and 9 on brackets II) and I I carried by front frame member I2. The strips 6 and I are provided with a substantially horizontally extending 1 brace I l therebetween and are tapered or angularly disposed upwardly terminating in a pair of inter-connecting faces 6a and Ia which are connected through bolt members [5 and I6 secured by nuts at the ends thereof. Bolt mem--;

ber 15 provides a connection means for the link 5 leading to the hydraulic lift through suitable adjustment means such as link 5:; and adjusting bolt 51).

Bolt It provides connection means for the adjustment bar I'I shown more particularly in Fig. 8. Adjustment bar I1 is coupled to channelshaped brace member is which is apertured at spaced intervals represented at is to receive the bolt 20 in a selected position for effectively lengthening or shortening the adjustment bar.

The channel-shaped member I8 is pivotally connected to the bracket members 2i and 22 carried adjacent the rear of the front frame member I2. Bolt 23 extends through channel-shaped bar I8 and vertically disposed brackets 2i and 22 for forming a pivotal connection for channel l8.

Inasmuch as the vertically extending coupling means 6 and I are pivotally connected at 8 and 9 adjacent the frontof frame member I2,

lengthening of the adjustment means formed 0 by adjustment bar I! and co-acting channel I8 operates to incline the frame member 32 downwardly adjacent the rear thereof as represented in Fig. '7 for controlling the depth of penetration of the gangs of discs shown at 24 and 25 carried by the front frame member I2.

The gangs of discs 24 and 25 are supported beneath the front frame member I2 by means of depending brackets shown more clearly in Fig.

15 at 26, 21 and 28, 29 serving as a rigid support Q shafts Ela and 24a in the rear and front frame for the gangs of discs. The front frame member I2 is of rigid construction and extends in a substantially horizontal plane which is rigidly braced by angularly disposed substantially horizontal angular members 30 and 3! extending respectively parallel to the inclined side members 32 and 33 of the front frame member I2. The front frame member I2 tapers outwardly from a relatively narrow dimension at the front of the front frame member I2 to a relatively wide dimember I2 are of scalloped contour as repre--- sented more particularly in Fig. 13 at 34 to facilitate the penetration of the discs into the earth, the cutting of roots and the pulverization of the ground during the harrowing operation. It will be observed that the gangs of discs 2 and 25 are disposed at angles with respect to each other. I have determined after extended experimentation that the shafts 24a and 25:: carrying the gangs of discs 24 and 25 are most effective when mounted at an angle of l13 /2 to the plane of the supporting angles 30, 32 and BI, 33.

The front frame member I2 carries lug members 35 and 36 adjacent the rear thereof which provide hinged coupling means for the rear frame member shown at 31. The rear frame member 3? is also of rigid construction and is formed by angle members extending in a substantially horizontal plane which under normal conditions of use of the harrow in tandem arrangement is disposed coplanar with the plane of the front frame member I2. Rear frame member 31 is provided with upwardly extending angular disposed lug members 38 and 39 which are inclined at an angle to the front portion of the frame member 3? and extend between the lugs 35 and 36 at the rear of the front frame member I2. At the position in which the upper extremities of lugs 35 and lug 38 are aligned they are interconnected by bolt members 49 and 4| shown more particularly in Fig. 18. Each bolt member carries a sleeve bushing represented at 40a in Fig. 18 over which the co-acting lug member represented at 38 in Fig. 18 is journalled so that rear frame member 37 may be maintained in a position coplanar with front frame member I2 and rigidly interconnected therewith by coupling bolts 42 and 43 which extend through the depending flanges of abutting angles of the front frame member I2 and the rear frame member 31 when the frame members are in coplanar position. A pin member 44 carried by the rear portion of the front frame member I2 extends through a co-acting aperture 45 in the front portion of the rear frame member 3? for facilitating the aligning of the rear frame member 31 with the front frame member I2 in coplanar substantially horizontal relation.

The rear frame member 31 includes angularly disposed angle members 46 and 47 which extend in substantially parallel spaced relation to the ends of the rear frame member 3'! at 48 and 49 and provides supports for the gangs of discs represented at 58 and 5!. Discs 50 are carried by a shaft member 50a which is supported in depending brackets 53 and fat from the under-side of the rear frame member 3?. Similarly, the discs 5! are supported on shaft member 5m carried in depending brackets 55 and 5? extending beneath the rear frame member 3?. For most efifective operations I have found that the alternate members should extend in parallel spaced relation to each other. Similarly, alternate shafts 56a and 25a on the rear and front frame members 31 and I2 extend in parallel spaced relation. The planes of the discs 5| are disposed at 113 with respect to the rear of the rear-end member 31. The shafts 56a and 5Ia are set up at an angle of 66%! to the supporting angles at 2'1, 49 and 46, 48. That is to say, the discs 25 in the front frame member I2 are disposed in an angular direction opposite to the angular direction of the discs 5| in the rear frame member 31. Similarly, the discs 24 in the front frame member I2 are disposed at an angle with respect to the discs 50 frame member 3?.

across? the rear frame member 31. the coacting discs, when the fraiiies re arrange in coplanar relation as shown paftfiiiilarl'y in Figs. 1 and 2', operate in bush 'ana'bog relation.

,-Fig. Millustratesa typical-method of mounting the gang of discs wherein shaft Fla is supported in"depending'-brackets 56 and 5"! extending beneath end-member it-and strut 4B of the rear fromthe end frames 48 and*49. As distinguished from this, the scalloped discs in the front frame member I2 have an end disc'2 lc' and 25cdisp'osed The discs 51 are "positively spaced from each other 'bysleeve members 5Ib on immediately adjacent the end-frames 3-3 and 32.

This provides for a sufiicient oif-set relation between the discs to secure more effective pulverization of the earth. Conversely, the inner discs 5Id and 50d are disposed directly against the struts 46 and 41 respectively in the rear frame member 31 whereas the discs d and 24d are disposed in spaced relation to the struts and 3| in the front frame member I2 with respect to the discs of the rear frame member 31.

The rear frame member 31 is also provided with upstanding sets of brackets 58 and 59 on the front portion thereof which serves as engagement means for the vertically extending members 6 and I of the coupling means to the tractor when the front frame member I2 is eliminated and connection is to be made between the tractor and the rear frame member 31 direct and without the interposition of the front frame member I2. This condition is illustrated more particularly in Fig. 5. The rear frame member 31 also carries bracket BIB corresponding to brackets 2| and 22 on the front frame member I2 for connection of the adjustment means I'II8 thereto as will be explained more fully hereinafter.

The scalloped discs in the front frame member I2 serve to cut and pulverize the earth while the circular discs in the rear frame section 31 operate to further pulverize the earth in co-action with the preceding circular discs.

The agriculture equipment of my invention is useful in the treatment of earths of different characteristics and there are many conditions where the tandem operation of the front and rear frame members will not satisfactorily perform. Under certain conditions it becomes highly desirable to fold the rear frame member 31 over the front frame member I2 as represented in Fig. 3 whereupon the mass of the discs and rear frame member 31 are moved to a position where the center of gravity thereof is substantially over the discs in the front frame member I2. Under these conditions the rear frame member 31 rests against adjustment bar I! and channel 18 as an abutment stop as shown in Fig. 3 and provides a stabilized, concentrated weight rendered effective against the earth through the scalloped gangs of discs 24 and 25 in the front frame member I2.

As shown in Fig. 4 there are conditions where the entire rear frame member 31 may be disconnected from the front frame member I2 and the front frame member I2 employed independently of rear frame member 31 in the manner set forth in Fig. 4.

Also there are conditions heretofore alluded to in which the entire front section [2 should be eliminated and the rear section 31 utilized independently of the front frame member I2 in the arrangement shown in Fig. 5. When the rear frame member '31is"employedwithouttheiiiterposition of the front frame member I2 thereupling means comprising members "6 and I are removed from the frontsection I2 ana'coupieato the sets of lugs "brackets 58 and 59 foil the rear frame member 31 and the adjustment bar I! "and channel-shaped member I8 "connected therein "at "bolt member it and to the bracket members to which are'provided on the rear "of "the rear frame member 31, channel-shaped member I8 being pivoted therein as represented at 61. Thus "the rear frame member 31 when shiftedto'the front of the implement maype adjusted for depth of penetration in the"same"manne'rtha't front frame "member I2 was adjusted for deptho f penet'ration.

I have found the implement of my inventibn highly practical in its manufacture, production "and use, for 'the implement serves a multiplicity of purpose enabling one implement to do wtirk ordinaril'y'performed "bydiiferent implements.

While I described my invention in certain of its preferred embodiments I realize that modifications may be made in the details of construction of the equipment, and I desire that it be understood that no limitations upon my invention are intended other than may be imposed by the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is as follows:

1. A combination multiple and single section lift type disc harrow comprising a pair of substantially coplanar frame members, oppositely facing harrow disc units supported in depending relation beneath each of said frame members, means on the leading edge of one of said frame members connectible with a tractor, said last mentioned frame member having a linearly extending trailing edge, hinge members on said trailing edge of said last mentioned frame memher, the other of said frame members having a leading edge coextensive with the trailing edge of the aforementioned frame member and establishing a linear abutment when said frame members are disposed in coplanar relation, hinge members on the leading edge of said last mentioned frame member aligned with the hinge members on said first mentioned frame member, means pivotally interconnecting said hinge members whereby said second mentioned frame member may be moved vertically through an orbit confined within the limits of the width of the front frame member in the direction of said first mentioned frame member to a position whereby the harrow disc units supported thereby over the harrow disc units supported by said first mentioned frame member concentrate the mass thereof through the harrow units carried by said first mentioned frame member, said coextensive edges of said frame members restricting said second mentioned frame member against downwardly hinged movement with respect to said first mentioned frame member.

2. A combination multiple and single section lift type disc harrow as set forth in claim 1 including an abutment on said first mentioned frame member in which the means pivotally intel-connecting said hinge members are linearly spaced from said frame members for maintaining said frame members in spaced positions when said second mentioned frame member is moved to a position over said first mentioned frame member, against said abutment whereby the edges of the harrow disc units carried by the second mentioned frame member are elevated in spaced relation over the edges of the harrow disc units carried by m'ember."

the first mentioned frame 1 in which said abutment comprises a member extending'between said means connectible to a tractor and a central position on the trailing edge of said first mentioned frame member and constitutes a limiting abutment for restricting the angular movement of said second mentioned leading edge of said second mentioned frame member in a plane beneath the means pivotally interconnecting said hinge members and disconnectible to allow said second mentioned frame member to be swung in an orbit over said first mentioned frame member.

JACKSON PERRY ROBERTSON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 470,401 Richmond Mar. 8, 1892 792,294 Svanljung June 13, 1905 2,098,116 Warne Nov. 2, 1937 2,141,805 White Dec. 27, 1938 2,320,624 Love June 1, 1943 2,352,963 McMahon July 4, 1944 2,377,521 Rutter June 5, 1945 2,398,147 McKay Apr. 9, 1946 2,440,550 Martin Apr. 27, 1948 2,456,693 Fraga Dec. 21, 1948 

